Cartridge spreader system

ABSTRACT

The cartridge spreader system includes a mobile cartridge spreader with a cartridge station configured to engage a cartridge and includes a locking controller for locking the cartridge securely into the cartridge station. The cartridge station includes an activator mechanism for activating and deactivating an engaged cartridge. The cartridge spreader includes an activation controller for activating and deactivating the cartridge. Activation of the cartridge allows the granular product contained in the cartridge to flow out of the container, through a granular chute on the cartridge station, and onto a granular product launcher which launches or impels the granular product over terrain or other surface. When the cartridge is deactivated, the flow path is sealed stopping the flow of granular product. The cartridge itself includes a fitment that engages with the cartridge station. The cartridge fitment includes an appropriately sized metering gate.

RELATED ED APPLICATIONS

This application is a divisional of U.S. patent application Ser. No.12/347,752, filed on Dec. 31, 2008, and entitled “Cartridge SpreaderSystem,” which claims priority to and the benefit of the followingprovisional patent applications: (1) Ser. No. 61/051,867, filed on May9, 2008, (2) Ser. No. 61/116,967, filed on Nov. 21, 2008, and (3) Ser.No. 61/122,953, filed on Dec. 16, 2008. The contents of these priorityapplication are hereby incorporated by reference in their entirety.

FIELD OF THE INVENTION

The systems and methods described herein relate to cartridge spreaderdevices which are used in the consumer, professional or industrialmarkets, for example, to distribute granular product over terrain orother surfaces, and more particularly to a cartridge spreader devicewhich engages removable cartridges containing granular product to bedistributed over terrain or other surfaces.

BACKGROUND

Conventionally, consumers have applied granular lawn care product andother granular items to their property by using a granular productspreader. With the conventional granular product distribution system,consumers would primarily purchase their granular product in a bag orother container. Before they are able to apply the granular product totheir property, however, consumers would have to manually open the bag,lift the bag, and pour the granular product into the hopper of aconventional spreader system. There are several drawbacks associatedwith this conventional approach to distributing granular product.

One drawback of the conventional apparatus and system for distributinggranular product is that the process of opening a bag of granularproduct and pouring the granular product into the hopper is not alwaysseamless. The granular product bag may have to be opened using a knife,scissors, or some other cutting device. Further, the consumer may notknow how large of an opening to cut into the bag, and may cut an openingin the bag that is too large or too small, making it difficult to pourgranular product into the hopper. Further, in the transfer process, theconsumer needs to take care to not spill the product onto the groundwhen pouring it into the spreader. The transfer process may result inthe consumer coming into closer proximity to the granular product thanthey prefer. There are other reasons why the consumer might not like theprocess of pouring granular product into the hopper. For example, someconsumers may dislike the odor of the granular product, while others mayfind the bag heavy or cumbersome to pour. Some consumers may find thetask of opening the bag of granular product and pouring the granularlawn care product into a hopper laborious. Some may find it difficult topour the right amount of product into the hopper that will match thesize of their yard or property.

Another drawback of the conventional granular product distributionsystem is that a bag of granular product may not be easily re-sealablefor later use. As a result, some consumers may find it difficult tostore the granular product after the bag or container has been opened.Further, some consumers may be concerned about storing an open bag ofgranular product in their homes or other high traffic areas. Finally,after dispensing the granular product with a convention spreader system,some consumers find it difficult to transfer any left-over amount backinto the original product bag.

Yet another drawback of the conventional spreader systems is that thespreader itself may have an application rate adjustment mechanism thatthe consumer has to set correctly before applying the granular productto the lawn. Conventionally, some spreader settings are set inconjunction with the particular type of granular product being appliedto the lawn; thus, consumers would have to look at the granular productbag, find the spreader setting listed on the bag, and then physicallyset the spreader setting in accordance with what is listed on the bag.Failure to use the correct spreader setting may result in the consumerdispensing product at a rate other than what is recommended on thelabel. In failing to use the correct setting, consumers may choose anapplication setting that may not be appropriate for the particular typeof product. For example, consumers may use a setting from a previousapplication, which may not be optimum.

These and other drawbacks may be associated with conventional granularproduct distribution methods and devices.

SUMMARY OF THE INVENTION

Unlike conventional broadcast spreaders which require a consumer to opena bag of granular product, pour the product into a hopper, find (on thebag) and set (on the spreader) the appropriate flow rate, the cartridgespreader system described in the present application does not require acutting, tearing, or other manual opening of the product-containing bag.Rather, the cartridge may be locked into the spreader and then easilyactivated by the user. Further, the cartridge spreader described in thepresent application requires no settings. The consumer may simply lockthe cartridge into the spreader and trigger the activator handle tostart applying the granular lawn product. This results in reliable,consistent product distribution. Additionally, the cartridge spreaderdescribed in the present application requires no pouring. The consumermay simply lock the cartridge into the spreader, trigger the activatorhandle to activate the spreader, and begin spreading lawn care productacross their yard or other surface. In so doing, the consumer may applyproduct over their property without physically handling the granularproduct itself.

At the outset, it should be noted that the term “granular product” asused throughout this description, refers to product that is particulate(or granular) in nature in that it is a dry (not liquid) product that isflowable. For example, granular product may include without limitation,ice melting granules, fertilizer, pesticides, granular soil amendmentmaterial, granular oil absorbent material, dusting products, granularfloor cleaning product, grass seed, or any other product that is dry andflowable.

The systems and methods described herein includes a spreader that mayinclude at least one wheel which may be configured to rotate about atleast one axle. The axle may be fitted to the spreader through axlefitments on the spreader frame and may be rotatably coupled to a gearboxassembly. The gearbox assembly may be rotatably coupled with a rotatablegranular product launcher such that moving the at least one wheelforward will cause the launcher's rotating plate to rotate in a mannerthat broadcasts granular product in a swath of a desirable size (e.g.8-10 ft). The broadcast spreader may also include EdgeGuard® technologywhich may prevent granular product from being thrown onto sidewalks,driveways, or other areas, as described in U.S. Pat. No. 6,616,074,which is hereby incorporated by reference in its entirety. TheEdgeGuard® technology is mentioned in various places throughout thespecification. In the specification, this feature will be referred to as“edge guard.”

The spreader may further include a cartridge station. The cartridgestation may be configured such that a cartridge containing granularproduct can engage directly with the spreader and then lock into placewith a locking mechanism. The cartridge station may also include agranular chute of a fixed size that may facilitate the flow of productfrom the cartridge to the granular product launcher.

The systems and methods described herein also include a cartridge. Thebottom of the cartridge may include a fitment component configured toengage with the cartridge station of the spreader. The fitment componentfunctions to control the flow of product from the cartridge and mayinclude a metering gate of particular size that allows the correctamount of product to flow onto the rotatable granular product launcher.Thus, the product may be dispensed without having to adjust any settingson the spreader. When the cartridge is engaged with the cartridgestation of the spreader, the cartridge, and particularly the fitmentcomponent, may fit in a predetermined orientation. This may beaccomplished through a special mating shape design. In some embodiments,the cartridge may lock onto the spreader automatically (spring-loaded),while in some embodiments the spreader may have a locking handle orlever a user may activate to lock the cartridge into place. Othermethods for locking the cartridge include, by way of non-limitingexample: bayonet lock, snap fit, threaded fit, slide actuation, lugclosure, or magnetic interlocking.

Once a cartridge is engaged with the spreader, the user may activate thecartridge to allow product to automatically flow at a fixed flow ratewhen the spreader is pushed by a user. In some embodiments, for example,a protrusion in the cartridge may engage with the spreader to enableon/off flow control. The protrusion may be connected to a spring-loadedon/off lever on the spreader handlebar that the user may actuate tocontrol the flow of granular product. The lever may be connected to thecartridge via a sheathed cable. When the lever is actuated, thecartridge may be opened and product may flow out of the cartridge andonto the rotatable product launching plate of the product launcher whichthen may broadcast the product out in front of the spreader. The levermay be spring-loaded, such that when the lever is released, thecartridge may be closed and the flow of product may be stopped.

The cartridge may also include an agitator to help prevent product frombridging as it flows out of the cartridge. The agitator mechanism may“key” into the launcher gearbox, such that rotation of the spreaderwheels results in rotation of the agitator. In some embodiments, theagitator may not be necessary for a flowable product, but can be addedfor products with a tendency to bridge.

The cartridge may also be configured such that when the consumerreleases or disengages the cartridge from the spreader, the cartridgemay automatically seal (e.g. a shutoff plate may block product fromflowing out of the container) so that no residual product flows out ofthe cartridge during the removal process or during storage. In someembodiments, when the spreader is not in use (e.g. in an idle position)a front upright support stand and/or foot rest may keep the spreader inthe upright position. This stand may keep the spreader stable with orwithout a cartridge attached and may provide a convenient position forthe user to stabilize the spreader as the cartridge is inserted andengaged.

According to one embodiment of the systems and methods described herein,a mobile device for spreading, over terrain or other surface, granularproduct applications contained in a cartridge is provided. The devicecomprises: a granular product launcher; a cartridge station comprising:at least one cartridge engager; a particle conveyor configured tofacilitate the flow of granules from the cartridge to the granularproduct launcher; a cartridge activator, configured to activate anddeactivate the flow of granular product out of a cartridge; and anactivation controller configured to control the cartridge activator andthereby control the activation and deactivation of an engaged cartridge.

In another embodiment of the systems and methods described herein, acartridge containing granular lawn care product or other granularapplications is provided. The cartridge comprises: a container; afitment functionally joined to the container comprising: a fitment shellconfigured to be joined to an end of the container; a flow metering gateconfigured to dictate the flow rate of granular product; an activatorconfigured to activate and deactivate the flow of granular product outof the cartridge.

In yet another embodiment of the systems and methods described herein, asystem for distributing granular product across terrain or other surfaceis provided. The system comprising: a spreader device comprising: aparticle launcher; a cartridge station configured to engage with acartridge, comprising: a particle conveyor configured to facilitate theflow of granules from the cartridge to the particle launcher; acartridge activator, configured to activate and deactivate the flow ofgranular product out of a cartridge; an activation controller configuredto control the cartridge activator and thereby control the activationand deactivation of an engaged cartridge; a cartridge comprising: acontainer; a fitment configured to engage with the cartridge stationcomprising: a metering mechanism, wherein the flow of granular productis controlled by the metering mechanism in the cartridge.

In still another embodiments of the systems and methods describedherein, a mobile device for spreading, over terrain or other surfaces,granular product contained in a cartridge is provided. The mobile devicecomprising: cartridge engaging means for engaging a cartridge with thespreader; locking means for locking the cartridge onto the spreader;activating means for activating the cartridge to allow granular productto flow; broadcasting means for broadcasting granular product acrossterrain; deactivating means for deactivating the cartridge to preventgranular product from flowing; controlling means for controllingactivation and deactivation of the cartridge; upright resting means forallowing the spreader to stand upright in a resting position; framecollapsing means for collapsing spreader into a compact form.

DESCRIPTION OF THE FIGURES

FIG. 1 depicts a perspective view of a spreader, according to anembodiment of the systems and methods described herein.

FIG. 1( a) depicts an exploded view of various components of a spreader,according to an embodiment of the systems and methods described herein.

FIG. 1( b) depicts an view of the attachment between the upper and lowerframe assembly, according to an embodiment of the systems and methodsdescribed herein.

FIG. 1( c) depicts an view of the attachment between the upper and lowerframe assembly, according to an embodiment of the systems and methodsdescribed herein.

FIG. 2 depicts a front elevation view of a spreader, according to anembodiment of the systems and methods described herein.

FIG. 2( a) depicts a front elevation view of a spreader including cablesconnecting components in the upper frame assembly to the cartridgestation, according to an embodiment of the systems and methods describedherein.

FIG. 3 depicts a rear elevation view of a spreader, according to anembodiment of the systems and methods described herein.

FIG. 3( a) depicts a rear elevation view of a spreader including cablesconnecting components in the upper frame assembly to the cartridgestation, according to an embodiment of the systems and methods describedherein.

FIG. 4 depicts a side elevation view of a spreader, according to anembodiment of the systems and methods described herein.

FIG. 4( a) depicts a side elevation view of a spreader with an engagedcartridge, according to an embodiment of the systems and methodsdescribed herein.

FIG. 5 depicts a top plan view of a spreader, according to an embodimentof the systems and methods described herein.

FIG. 6 depicts a bottom plan view of a spreader, according to anembodiment of the systems and methods described herein.

FIG. 7 depicts a side elevation view of a spreader in the uprightposition, according to an embodiment of the systems and methodsdescribed herein.

FIG. 8 depicts a front elevation view of a spreader with a cartridgeattached, according to an embodiment of the systems and methodsdescribed herein.

FIG. 9 depicts a view of the cartridge fitment (top/inside view) andcartridge container, according to an embodiment of the systems andmethods described herein.

FIG. 9( a) depicts a side view of the cartridge with fitment attached tothe container, according to an embodiment of the systems and methodsdescribed herein.

FIG. 10 depicts a bottom plan view of a product cartridge, particularlyshowing a fitment component which engages a spreader body, according toan embodiment of the systems and methods described herein.

FIG. 11 depicts various layers on the inside face of the cartridgefitment, according to an embodiment of the systems and methods describedherein.

FIG. 12 depicts a bottom view of the cartridge fitment, according to anembodiment of the systems and methods described herein.

FIG. 13 depicts the cartridge station with the cartridge lockingmechanism in the locked or stabilized position, according to anembodiment of the systems and methods described herein.

FIG. 13( a) depicts various components of the cartridge station,according to an embodiment of the systems and methods described herein.

FIG. 13( b) is an illustration of both the cartridge station and thecartridge fitment, according to an embodiment of the systems and methodsdescribed herein.

FIG. 13( c) depicts a view of the bottom side of the cartridge station,according to an embodiment of the systems and methods described herein.

FIG. 14 depicts a cross sectional view of the cartridge spreader withoutthe cartridge engaged, according to an embodiment of the systems andmethods described herein.

FIG. 15 depicts a close up cross sectional view of the spreader lowerhousing without the cartridge engaged, according to an embodiment of thesystems and methods described herein.

FIG. 16 depicts a close-up cross sectional view of the handle assemblywithout the cartridge engaged.

FIG. 16( a) depicts a detailed front view of the upper frame assembly,according to an embodiment of the systems and methods described herein.

FIG. 16( b) depicts a rear view of the upper frame assembly includingcables connecting from the activation controller and the edge guardcontroller, according to an embodiment of the systems and methodsdescribed herein.

FIG. 16( c) depicts a rear view of the upper frame assembly, withactivator controller 20 pulled to the “on” position, including cablesconnected to the activation controller and the edge guard controller,according to an embodiment of the systems and methods described herein.

FIG. 17 depicts a cross sectional view of the cartridge spreader withthe cartridge engaged, according to an embodiment of the systems andmethods described herein.

FIG. 18 depicts a close-up cross sectional view of the spreader lowerhousing with the cartridge engaged, according to an embodiment of thesystems and methods described herein.

FIG. 18( a) depicts a close-up cross sectional view of the spreaderlower housing with the cartridge engaged and illustrates the flow ofgranular product out of the cartridge, according to an embodiment of thesystems and methods described herein.

FIG. 19 depicts a close-up cross sectional view of the handle assemblywith the cartridge engaged, according to an embodiment of the systemsand methods described herein.

FIG. 20 depicts the gearbox, according to an embodiment of the systemsand methods described herein.

FIG. 21 depicts the granular product launcher assembly, according to anembodiment of the systems and methods described herein.

FIG. 21( a) depicts a view of the top side of the upper plate of thelauncher assembly, which joins the cartridge station, according to anembodiment of the systems and methods described herein.

FIG. 22 depicts the lower housing of the spreader, according to anembodiment of the systems and methods described herein.

FIG. 23 depicts a view of the bottom side of the cartridge station and aview of the top side of the upper plate of the launcher assembly,according to an embodiment of the systems and methods described herein.These views are depicted individually in FIGS. 13( c) and 21(a).

FIG. 24 is a front view of the launcher assembly which specificallydepicts the edge guard feature, according to an embodiment of thesystems and methods described herein.

FIG. 25 is a view of the granular product launcher which specificallydepicts the edge guard feature rotated in an “on” position, according toan embodiment of the systems and methods described herein.

DETAILED DESCRIPTION OF THE INVENTION

The following description is intended to convey a thorough understandingof the embodiments described by providing a number of specificembodiments and details involving a cartridge spreader system. It shouldbe appreciated, however, that the present invention is not limited tothese specific embodiments and details, which are exemplary only. It isfurther understood that one possessing ordinary skill in the art, inlight of known systems and methods, would appreciate the use of theinvention for its intended purposes and benefits in any number ofalternative embodiments, depending on specific design and other needs.

FIG. 1 illustrates a perspective view of a spreader. The spreader devicemay be a movable device configured for broadcasting granular productonto a lawn, terrain, or other surface. The spreader device may includea spreader body 40 and a spreader frame 10. The spreader frame 10 mayinclude a lower frame 12 which may include axle fitments 28 (shown inFIG. 1( a)), an upper handle assembly 14, and an upright stand 16. Insome embodiments, the upright stand 16, the axle fitment 28, upperhandle assembly 14 and lower frame 12 may comprise a single continuouscomponent or structure, while in other embodiments, each may comprise aseparate or distinct component or structure, as shown.

In some embodiments, upper handle assembly 14 may be configured to beremovably connected to lower frame 12 via a handle lock tube 26, whichis depicted in more detail in FIG. 1( c). The upper handle assembly 14may also include a frontwardly protruding abutment 24 to which acartridge container, as shown in FIG. 8, may be attached for additionalstabilization of the cartridge container. The upper handle assembly 14may also include a controller 22 for activating or deactivating an edgeguard feature. Activation of the edge guard feature may compriserotating or otherwise positioning an edge guard component (shown as 66in FIG. 21) partially outside the periphery of the granular productlauncher 60 to prevent granular product from being thrown ontosidewalks, driveways, or other areas. The edge guard feature may alsoinclude a visual indicator (as shown in FIG. 25) that may allow theconsumer to see when the edge guard is in an activated position. Thevisual indicator may be a protruding piece, for example, that may stickout when the edge guard is in the activated state. In some embodiments,edge guard controller 22 may be a mechanical lever, as shown, while insome embodiments it may be an electrical switch. In addition, edge guardcontroller 22 may, in some embodiments, include a digital or analogadjuster to control the amount that the edge guard rotates over theperiphery of the granular product launcher 60.

Upper handle assembly 14 may also include a cartridge activatorcontroller 20. The cartridge activator controller 20 may be physicallylinked to the cartridge station 70 (e.g., via cabling as shown in FIGS.2( a), 3(a), 13(c), 16(b), 16(c) such that the cartridge activatorcontroller 20 provides a mechanical control of the cartridge activator.The cartridge activator controller 20 may also be linked to thecartridge station 70 such that the cartridge activator controller 20 maydictate the movement of the cartridge activator through an electroniccontrol mechanism or device. The cartridge activator controller may alsobe configured to wirelessly control the cartridge activator on thecartridge station 70. Upper handle assembly 14 may also include a handlestructure 18, which may be ergonomically designed to allow for easycontrol over the movement of the spreader 10.

The spreader device may include a spreader body 40. The spreader body 40may be made of a variety of plastic resin, metal, or other desirablematerial(s). The spreader body 40 may include a spreader lower housing50 and a granular product launcher 60 which operates to propel granularproduct onto property terrain, or other surface. The spreader body 40may also include a cartridge station 70 into which a cartridge isinserted and engaged as further described herein. The spreader lowerhousing 50 may provide structural support for the spreader device, whichmay allow the spreader to be balanced and sturdy. The spreader body 50may include one or more axle clearance holes, which may be configured tobe intersected by or contained by an axle to which two wheels 30 canconnect. It should be noted that the figures, which depict the spreaderas having two wheels, are merely exemplary. In some embodiments, thespreader may have a single wheel and in some embodiments the spreadermay have two or more wheels. To the extent that this specificationrefers to “wheels” it is an exemplary reference only and should not beconstrued as limiting the scope of the systems and methods describedherein. In some embodiments, the spreader lower housing 50 may beeliminated and the axle may be held in place with the axle fitments onthe tubular handle.

Granular product launcher 60 (and in particular launching plate 62) maybe configured to launch granular product across a swath of property orother terrain (e.g. lawn) of predetermined width. Granular productlauncher 60 may be configured as a plate-like device 62 which rotatesabout a central axis in accordance with the rotation of the at least onewheel on at least one axle. In particular, granular product launchingplate 62 may be rotatably coupled to the at least one axle 32 such thatthere is a positive correlation between the revolutions per minute ofthe at least one wheels and the revolutions per minute of the granularproduct launching plate 62.

Spreader body 40 may also include a cartridge station 70. Cartridgestation 70 may be configured to receive and engage a cartridge ofgranular product as described herein. Cartridge station 70 may include afront panel 74 which may include a cartridge locking switch 72. Thecartridge locking switch 72 may be automatically or manually engaged inon and off position, for example, to lock or unlock a cartridge insertedinto cartridge station 70.

In some embodiments, the cartridge locking switch 72 may be turned onand off by manual or electro-mechanical device or means. It may beautomatically set to secure the cartridge after a predetermined event,or it may be programmable so that the consumer has the capability ofautomating the process of securing and stabilizing the cartridge intothe cartridge station 70. In some embodiments, the cartridge lockingswitch 72 may be located at the handlebar area 18 or elsewhere on thespreader.

FIG. 1( a) depicts an exploded view of various components of thespreader of FIG. 1. On the lower frame 12 of the spreader frame 10, axlefitments 28 may be included. Axle 32 may be threaded through axlefitments 28 and gearbox 34. At least one wheel 30 may be connected tothe at least one axle 32. In some embodiments, rotation of at least oneaxle 32 may cause rotation of the gearbox 34, which may drive thelaunching plate 62 of the launcher 60. The launcher 60 may be connectedto the cartridge station 70 at least by way of agitator driver 80 andbevel gear 84. In some embodiments, spreader lower housing 50 mayinclude clearance holes which may be joined or otherwise aligned withaxle fitments 28 to receive axle 32. The upright stand 16 may beconfigured as a contiguous piece of the lower frame 12.

In some embodiments, the front panel 74 of the cartridge station 70 maybe configured such that a locking switch 72 may be positioned by a user,for example, in the locked and unlocked positions when a cartridge hasbeen inserted into cartridge station 70. For example, after a cartridgeis positioned within cartridge station 70, a user may secure thecartridge in a locked position by moving the locking switch into thelocked position. To remove the cartridge, the user may move the lockingswitch to the unlocked position.

In some embodiments, the upper frame assembly 14 and the lower frameassembly 12 of the spreader frame 10 may be connected via a handle locktube 26. FIG. 1( b), for example, depicts an upclose exploded view ofthe attachment between the upper frame assembly 14 and lower frameassembly 12. FIG. 1( c) depicts an upclose view of the attachmentbetween the upper and lower frame assemblies 14 and 12, respectively. Asshown, upper and lower frame assemblies 14 and 12 may be connected witha handle lock tube 26 which may work in conjunction with handle lock nut27 and handle lock bolt 28. The handle lock tube 26 may be adjusted totighten, loosen, or disengage the connection between the lower frame 12and the upper handle assembly 14. In some embodiments, the handle locktube 26 may be configured such that twisting the tube in one directionor another will loosen or tighten the connection between the lower frameand the upper handle assembly. When the handle lock tube is twisted, theupper frame assembly 14 may be able to swivel about the handle lock boltaxis, allowing the upper frame assembly 14 to be folded down for easierstorage.

In some embodiments, the handle lock tube may engage with a keyedinternally threaded sleeve, which may engage with an externally threadedrod. The threaded rod and the threaded sleeve may pass through holes inthe upper and lower handle tubes. The externally threaded rod may bekeyed to the hole in the handle tubing so it cannot rotate. Theinternally threaded sleeve may rotate within the clearance holes in thehandle assembly. As the handle lock tube is rotated to tighten, it maymake the threaded sleeve move along the threaded rod, which may shortenthe horizontal dimension between the ends of the handle assembly. Thismay allow the mating shapes at the end of the lower handle to engagewith the upper handle and may apply frictional pressure to secure thehandle. In some embodiments, the handle lock tube also has an externalrounded shape that allows it to function as an easy carry handle for theentire applicator. In an alternative embodiment, the handle lock tubemay engage the upper and lower frame assemblies by way of a conventionalwing nut and bolt, cam lock, or bayonet assembly.

FIG. 2 illustrates a front elevation view of the spreader of FIG. 1. Inaddition to showing much of what was described above with respect toFIG. 1, this view illustrates the drive shaft connection 64 between thegranular product launcher 60 and the cartridge station 70. As describedin greater detail below, the rotation of the drive shaft connectiongranular product launching plate 62 drives the agitator shaft 80 (shownin FIG. 5) of the cartridge station 70. The two rotating shafts 64 and80 may be rotatably coupled through a bevel gear. The spreader frame 10may be configured with axle fitments 28 such that at least one axle maybe threaded through the frame itself. Wheels 30 may be joined on acommon axle to provide mobility to the spreader. In some embodiments, atleast one axle fitments 28 on the spreader frame may be joined orotherwise aligned with the one or more axle clearance holes of thespreader lower housing 50 to provide structural support, sturdiness, andstabilization for the spreader device. In some embodiments, however, theaxle may be structurally held in place with the axle fitments attachedto the lower frame assembly. The plastic lower housing may therefore maysimply act as a cover to complete the overall form and hide themechanisms.

FIG. 2( a) depicts a front elevation view of a spreader including cablesconnecting from the upper frame assembly to the cartridge station. Acable 23 may functionally link the edge guard controller 22 with theedge guard. A cable 21 may functionally link the activator controller 20with the cartridge activator at the cartridge station. Each cable maytherefore operate to activate or engage the appropriate component withinspreader body 40.

FIG. 3 depicts a rear elevation view of the spreader. The top ofcartridge station 70 is shown from this view. Wheels 30 are shown asbeing connected through axle fitments 28 and clearance holes 52. Upperhousing panel 56 and ventilation holes 54, which are a part of spreaderlower housing 50 are illustrated. The ventilation holes 54 in thespreader lower housing 50 allow product a way out of the containedhousing so that product does not build up on the inside of the spreaderlower housing and potentially cause clogging or interference with therotation of the granular product launching plate 62 (as shown, forexample, in FIG. 2). The ventilation holes 54 may provide a way forgranular product collected behind the launching plate to escape thespreader and not cause a potential malfunction. The ventilation holes 54also help with cleaning of the spreader. This rear view illustrates thatthe wheels 30 may be connected on a common axle which may be threadedthrough axle fitments 28 on the lower handle assembly 12 and clearanceholes 52 of the spreader lower housing 50. In some embodiments, the axlefitment 28 of the lower assembly and the axle clearance hole 52 of thespreader lower housing 50 may be flush against one another.

FIG. 3( a) depicts a rear elevation view of a spreader including cablesconnecting controls at the upper frame assembly to the cartridge station70. Each cable may therefore operate to activate or engage theappropriate component within spreader body 40. For example, cable 23 mayfunctionally link the edge guard controller 22 with the edge guardcomponent 66 (shown in FIG. 21). Similarly, cable 21 may functionallylink the activator controller 20 with the cartridge activator 78 (shownin FIG. 5) at the cartridge station 70.

FIG. 4 depicts a side elevation view of the spreader of FIG. 1. Thisillustration shows many of the features discussed in reference to FIGS.1-3. Additionally illustrated is the depth of the container attachmenthandle 24. Further, FIG. 4 illustrates that the ventilation holes 54 ofthe spreader lower housing may be disposed on an inward sloping face ofthe spreader lower housing. This may allow more room for excess granularproduct to escape from the contained area should a build-up occur.Further, the ventilation holes 54 may be disposed at or below the bottomheight of the granular product launching plate 62. Such disposition mayallow the ventilation holes a greater likelihood of providing straygranular product with a window to escape. Also, as shown the spreader isin the approximate position it would be when being pushed by a user.

As shown in FIG. 4 a, the container when engaged in cartridge station 70may essentially be positioned approximately 30-50 degrees off the dashedvertical line, in much the same manner as upper frame assembly 14 andlower frame 12 are shown in FIG. 4. The positioning of the cartridge inthis manner offers several benefits. For example, the positioningchanges the center of gravity of the spreader and thereby enhances itsmaneuverability during use. In addition, by engaging the container in anangular position relative to the dashed vertical line, product is ableto more easily flow out of the container and onto launching plate 62. Inparticular, as shown in FIGS. 5, 9 and 18(a), for example, product isable to more easily flow out of the container as a result of placing themetering gate 114 in such a way that product is urged to flow downthrough it, rather than accumulate around it as would be the case werethe container positioned in an upright manner. Put another way, theangular positioning of the container relative to the dashed line enablesthe “funneling” product in a desired flow path. Of course, the relativepositioning of the container relative to the vertical would changeduring actual use of the spreader, but the relative positioning of FIGS.4 and 4 a is offered only as an example to better appreciate theappearance of the spreader during use. In contrast to the positioning ofthe spreader shown in FIGS. 4 and 4 a, FIG. 7 depicts a side elevationview of a spreader in its resting, upright position—resting on theupright stand 16.

FIG. 4( a) depicts a side elevation view of the spreader of FIG. 1 witha cartridge engaged. This illustration shows many of the featuresdiscussed in reference to FIGS. 1-4. The figure illustrates thatcartridge 100 may include a container 104 which may be attached to thecontainer attachment handle 24 which may provide additional stability tothe container. When the cartridge is engaged as shown, the upper frameassembly 14 and lower frame assembly 12 may act together as a singleframe entity. Also, as shown the spreader is in the approximate positionit would be when being pushed by a user. The cartridge 100 may engagewith the cartridge station 70 (which is illustrated, for example, inFIG. 13). When engaged in the cartridge station 70, the container may bepositioned approximately 30-50 degrees off of the dashed vertical lineand may be substantially parallel with upper frame assembly 14 and lowerframe assembly 12.

FIG. 5 depicts a top plan view of the spreader. Cartridge station 70 maybe configured to receive, engage and activate a cartridge of granularproduct. In some embodiments, cartridge station 70 may be configured toengage a cartridge fitment because of the arrangement of the mechanicalfeatures (e.g. the mechanical features and design of the cartridgestation 70 may be matched to facilitate mechanical engagement andlocking of a cartridge as described herein). In some embodiments,cartridge station 70 may be configured to engage a cartridge fitmentbecause of the shape and size of the perimeter of the station. Cartridgestation 70 may also be configured to engage a cartridge fitment becauseof a magnetic effect or by adhering to the cartridge fitment. In someembodiments, the cartridge station 70 may be configured to engage with acartridge fitment through a membrane puncture.

As shown in FIG. 5, cartridge station 70 may include a granular chute 76through which granular product may flow from the cartridge down onto thegranular product launching plate 62 (shown in FIG. 5, for example)during use. To facilitate flow from the cartridge down into thespreader, cartridge station 70 may include an agitator shaft 80 whichmay be configured to engage with and drive the rotation of an internalcartridge agitator 118 (as shown in FIG. 11) which may be includedinside the cartridge. In some embodiments, cartridge station 70 may alsoinclude cartridge stabilizers 82. The cartridge stabilizers 82 mayinclude rotatable stabilizing engagers 83 that move in conjunction withthe position of cartridge locking switch 72, which may be disposed onthe front panel 74 of the cartridge station 70. As described in moredetail in FIG. 13, after a cartridge is inserted into cartridge station70 and locking switch 72 is moved to the lock position, cartridgestabilizers 82 may securely engage and lock the cartridge via rotatablestabilizing engagers 83.

In some embodiments, cartridge station 70 may also include cartridgeactivator 78. Cartridge activator 78 may comprise a shiftable abutmentthat may be configured to mechanically engage with a cartridge shut-offplate 120 (as shown in FIG. 11). In particular, cartridge activator 78may, when activated, cause shut-off plate 120 to slide so that it doesnot block granular product from flowing downwards with the pull ofgravity. In some embodiments, cartridge activator 78 may be controlledfrom the handlebar assembly with cartridge activator controller 20. Inparticular, when a user pulls or squeezes cartridge activator controller20 on the handlebar, the flow of the granular product from the cartridgeis activated. When the cartridge activator controller 20 is released andpermitted to return to the position shown in FIG. 5, the position of thecartridge shut-off plate is such that flow of the granular product outof the cartridge is blocked. The cartridge activator controller 20 isnot limited to a trigger location on the handlebar assembly. Indeed, thecartridge activator controller 20 may be arranged in any convenientlocation on the spreader device. In some embodiments, the cartridgeactivator controller may be electronic, in which case a mechanical linkmay not be necessary. In some embodiments, the cartridge activatorcontroller may communicate wirelessly with the cartridge activator, inwhich case a physical link may not be necessary. The cartridge activatorcontroller may be manual, automatic, or semi-automatic.

FIG. 6 depicts a bottom plan view of a spreader. The ventilation holes54 may be configured to allow errant granular product (and any collectedwater that may accumulate during cleaning of the spreader) to vent ordrain out of the spreader lower housing. As previously discussed, thelower assembly frame 12 may include an axle fitment 28 and the spreaderlower housing 50 may include axle fitment 52. The respective fitmentsmay be configured such that the at least two wheels 30 may be coupledvia the at least one axle 32. The lower assembly frame 12 may be longenough to extend outwardly in front of the spreader lower housing andserve as an upright stand 16.

FIG. 8 depicts a perspective view of the spreader device with removablecartridge 100 engaged. Cartridge 100 may include a container 104 and afitment 110 (as shown in FIG. 9). The container may be a bag or anothertype of receptacle. The container 104 may be configured such that acartridge fitment 110 may be sealed to or otherwise fitted onto one endof the container 104. In some embodiments, the container 104 may beattached to the fitment 110 via heat welding or sealing, an adhesive,ultrasonic welding or sealing or other appropriate attachment techniqueor material. The container 104 may be constructed of any number ofmaterials, and may comprise a single layer or multiple layers. Forinstance, the container layers may include low, medium or high densitypolyethylene, polyester, polyamide, polypropylene, or other like orappropriate material. As a non-limiting example, the container mayinclude a polyester layer, a metalized polyester layer, and a layer oflow density of polyethylene. The cartridge may be made of various otherflexible, rigid, or semi-rigid materials.

As shown in FIG. 8, the cartridge 100 may be attached to cartridgehanger 24 via the container attachment opening 102 to provide additionalstability for the cartridge during use. The cartridge 100 may be in anunactivated state when initially engaged with the cartridge station 70.That is, the shut-off plate 120 (shown in FIG. 11) may be positioned toblock the flow of granular product out of the container 104. Inaddition, the cartridge 100 may also be in an unlocked state (e.g., thecartridge locking switch 72 is in the unlocked position, as shown inFIG. 8) when initially engaged with the cartridge station 70. Thecartridge may be locked and/or activated using various controllers onthe spreader device. Once the cartridge is activated—by squeezing oractuating controller 20, for example—product may be permitted to flowfrom the cartridge down through the granular chute 76 (as shown in FIG.18( a), for example) and onto the granular product launching plate 62where the individual granular pieces may be launched in a predeterminedswath in front of the spreader device. Similarly, by moving thecartridge locking switch 72 to the locked position, the cartridge 100may be locked securely within cartridge station 70.

FIG. 9 depicts the cartridge bag 104 divorced from the cartridge fitment110. The container 104 and fitment 110 may be jointly configured so thatthe fitment may be sealed to or otherwise attached to one end of thecartridge container 104. Thus, the face 112 of the cartridge fitment(i.e. the face 112 that is visible as illustrated in FIG. 9) may bedisposed on the inside of the container such that it is not otherwisevisible to the user when the fitment 110 is attached to one end of thecontainer 104. In some embodiments, the bottom of the fitment 110 isapproximately flush with the container 104 so that fitment 110 is almostnot noticeable when cartridge 100 is view from a side perspective.

As shown in FIG. 9, cartridge fitment 110 may include an agitator 118which may rotate in accordance with the rotation speed of the granularproduct launching plate (not shown) to agitate product inside thecontainer. The action of the agitator 118 may help ensure even productflow. The agitator 118 may rotate inside the container itself. In otherwords, the agitator may be on the container side of the fitment. Thecartridge fitment may also include a metering plate 116, which mayfurther include a metering gate 114 of predetermined size. In someembodiments, the size of the metering gate 114 may be predeterminedbased on the type of product in the container 110. For example, someproduct may have an appropriate flow rate that differs from otherproducts and a smaller or larger metering gate 114 in the metering platemay therefore be appropriate.

FIG. 9( a) depicts a side view of cartridge 100. The cartridge 100 mayinclude a container 104 which may hold various varieties of granularproduct. The cartridge 100 may include a container attachment opening102 which may be attached with a container attachment handle (which isillustrated, for example, in FIG. 4( a)). Cartridge 100 may also includefitment 110, which may be configured to engage with a cartridge stationand dispense granular product to a launching plate where it may belaunched or impelled across terrain or other surfaces. Fitment 110 maybe affixed with container 104 such that the cartridge 100 is a singleentity. The fitment 110 may be affixed to container 104 by variousmeans, including by way of non-limiting example, heat weld, ultrasonicwelding, use of various adhesives, or other like or appropriate materialor techniques.

FIG. 10 depicts a bottom plan view of a flexible or rigid productcartridge which has been attached to a fitment 110 configured to engagewith a cartridge station 70 (e.g. the view shown by the arrow “A” inFIG. 9( a)). The cartridge fitment 110 may be configured such that thefitment 110 mechanically engages with the cartridge station 70. Forexample, the agitator driver 80 (as shown in FIG. 5) may becomemechanically engaged in a mating shape or keyed fashion with theagitator drive shaft 122 on the cartridge fitment 110. As such, theagitator drive shaft of 122 may rotate as the spreader is pushed by auser. Further, the product conveyor 128 may fit geometrically within oraround the granular chute 76 (shown in FIG. 5) on the cartridge station70. In this way, product flowing out of container 104 and into thespreader may do so through a securely defined flow path. Additionally,the cartridge activator 78 on the cartridge station 70 may be configuredto engage or mate with and rotate the shut-off plate 120 (as shown inFIG. 11) at the activation slide 124 of the cartridge fitment. In someembodiments, activation slide 124 is attached to shut-off plate 120 sothat movement of activation slide 124 results in rotational movement ofthe shut-off plate 120, which in turn enables the selective opening andblocking of the product flow path out of the container 104. Indeed,rotation of the shut-off plate 120 may constitute activation anddeactivation of the cartridge.

In some embodiments, fitment 110 may include locking features 126 whichare geometrically aligned with cartridge stabilizers 82 on the cartridgestation 70. Such matching geometric features may allow for the cartridgeto easily engage with the cartridge station and then become locked intoplace. In some embodiments, the locking action may result fromstabilizing engagers 83 (which are associated with the cartridgestabilizers 82) being inserted into the locking features 126 to ensure atight and secure attached of the cartridge 100 to the cartridge station70. In some embodiments, stabilizing engagers 83 may be selectivelymoved by a user via locking lever 72. In addition, once the cartridge100 is locked in place, a user may selectively activate and deactivateproduct flow out of the cartridge and into spreader. When the cartridgeis de-activated (e.g., when the user releases controller 20), productfrom the cartridge may be prevented from flowing out of the cartridge.The cartridge 100 may then be removed without product spilling from thecartridge. FIG. 11 depicts the various layers of the cartridge fitment110 as seen from the top or inside face of the cartridge fitment 110.The cartridge fitment 110 may include a fitment shell 112, which may beconfigured to engage with the cartridge station 70 such that thecartridge is stable within the spreader and so that product can flowfrom the container down to the product launcher plate 62.

In some embodiments, the cartridge fitment shell 112, as well as theother components depicted in FIG. 11, may be made of a metallicmaterial, high-density polyethylene material, polypropylene material,polyamide material, rigid or semi-rigid polyolefinic material, or anyother another like or appropriate material. Each component of thefitment 110 will now be described. The cartridge fitment may include anagitator 118, which may rotate in accordance with the rotation of wheelsto agitate product inside the container. In some embodiments, agitator118 may be connected to agitator driver 80 (as shown in FIG. 1 a), whichin turn is connected to gearbox 34. In this way, agitator 118 may rotateas the spreader is pushed by a user. Rotation of the agitator may helpprevent clogging, bridging and/or clumping of product within thecontainer. While FIG. 11 depicts fitment 110 and its constituentcomponents in isolation, it may be appreciated that the components shownin FIG. 11 are all within the interior of the container and thus notvisible to the consumer during normal use and operation.

Fitment 110 may also include a metering plate 116. The metering platemay include a metering gate 114 of predetermined size and tabs 116 a.The size of the metering gate 114 may be predetermined based on the typeof product in the container. For example, some product may flow moreeasily than other types of product and a smaller metering gate 114 inthe metering plate may therefore be appropriate. The size of themetering gate 116 is preferably dependent on the particular granularproduct contained in the cartridge. In some embodiments, metering plate116 is positioned in a stationary manner within fitment shell 112 suchthat tabs 116 a fit within openings 116 b on the fitment shell 112. Whenso positioned, fitment 110 would appear as it does in FIG. 9.

Fitment 110 may also include a shut-off plate 120. The shutoff plate 120may rotate in conjunction with user activation as described herein. Inparticular, the shutoff plate 120 may be shifted, rotated, or otherwisemoved such that the chute 128, the metering gate 114 in the meteringplate 116 is aligned with the open portion of the shut-plate (andproduct is able to flow), or the metering gate is covered up and thecartridge is therefore sealed. The shutoff plate 120 may be rotated onand off with a trigger device, such as controller 20 (as shown in FIG.1, for example.) Such a trigger device, for example, may be included atthe handlebar of the spreader device, or any other convenient location.In some embodiments, fitment 110 may also include a spring 130 which maypre-load the shutoff plate 120 in the off or sealed position such thatthe metering plate metering gate 114 is covered up and product can notflow out of the container. Upon user activation of controller 20,however, the spring may be compressed by the movement of shutoff plate120 in an open position thus permitting the flow of product from thecontainer and into the spreader.

The cartridge fitment 110 may engage with the cartridge station 70 in avariety of manners. For example, the fitment 110 may engage mechanicallywith the cartridge station 70. In some embodiments, it could also engagewith the cartridge station through a membrane puncture mechanism, orthrough a temporary sealing device, for example.

FIG. 12 depicts a perspective view of the side of fitment 110 thatengages with the cartridge station 70. The features described in thediscussion of FIG. 10 are also shown in FIG. 12. The FIG. 12illustration provides a perspective view which better illustrates anembodiment that includes locking features 126 that may be configured togeometrically engage with the cartridge station and its lockingmechanism.

FIG. 13 depicts the cartridge station 70 with the cartridge lockingmechanism in the locked or stabilized position. The cartridge stationmay include granular chute 76, which may allow granular product to flowdownward to the granular product launcher. In some embodiments, thecartridge station may include cartridge activator 78 which may includean activator knob 86 which may be configured to move back and forth inthe slider slot 79. The activator knob 86 in the cartridge activator 78may be configured to engage an activator slide 124 on the cartridgefitment to permit the movement of the shutoff plate 120 (as shown inFIG. 10) in the fitment 110 of the cartridge 100 as described herein.

In some embodiments, the cartridge station 70 may include agitatordriver 80, which may drive the cartridge agitator 118. The cartridgestation 70 may include container edge seam details 88, which may allowthe cartridge fitment clearance to easily engage with the cartridgestation. The cartridge station may include cartridge stabilizer 82,which may engage with the cartridge fitment 110. Cartridge stabilizer 82may include rotatable stabilizing engagers 83. In this figure, rotatablestabilizing engagers 83 are illustrated in the locked or stabilizedposition. In some embodiments, the positioning of engagers 83 may becontrolled by the position of locking device 72.

FIG. 13( a) illustrates various components of the cartridge station.Specifically, FIG. 13( a) illustrates individual components of thecartridge station 70, which were described above with respect to FIG.13. The activator knob 86 and engagers 83 may be configured to rotateabout the same axis as the agitator driver 80 (as shown in FIGS. 5 and18 a, for example). Engagers 83 may be rotated using switch 72 which maybe received in slot 72(a).

FIG. 13( b) is an illustration of both the cartridge station 70 (onleft) and the cartridge fitment 110 (on right). This illustrationprovides a visual indicator of how the cartridge fitment 110 engageswith the cartridge station 70. As shown, the cartridge fitment 110 maybe shaped in a like manner as cartridge station 70 so that they fittogether in a tight and secure manner. Further, the fitment 110 and thecartridge station 70 may connect in several spots. For example, theagitator driver 80 of the cartridge station 70 may fit within theagitator drive shaft 122. The two may be configured such that rotationof the agitator drive 80 causes the agitator 118 (as shown in FIG. 11,for example) to rotate. Thus, the agitator driver 80 and the agitatordrive shaft 122 may be configured to fit together physically as well asfunctionally.

The granular chute 76 may connect with the granular product conveyor128. When granular product flows out of the conveyor 128, it flowsdirectly through the granular chute on its way down to the granularproduct launcher. The chute and the conveyor may be configured such thatthey fit together geometrically. This may allow additional stabilizationfor the engaged cartridge. It may also allow for a sealed passageway forthe granular product to flow from the cartridge down to the granularproduct launcher.

Cartridge stabilizers 82 may be configured to align with lockingfeatures 126. This alignment may allow the stabilizing engagers (whichare not illustrated in this figure, but are shown in described withrespect to FIG. 13) to engage the locking features 126 and thereby lockthe cartridge in a secure stable position. The stabilizing engagers maybe controlled by the locking lever 72.

The cartridge station 70 may include a cartridge activator 78, which mayshift back and forth at the control of the user. Cartridge activator 78may include an activator knob 86 which may be shifted or rotated withinactivator channel 79. The cartridge fitment 110 may include anactivation slide 124 which may be slid or shifted to activate ordeactivate the flow of granular product out of the cartridge. Activationslide 124 may include a slide engager 127 and an activation slidechannel 125. The activator knob 86 may be configured to engage with theslide engager 127 such that the user-controlled movement of the knobcontrols the movement of the activation slide 124 within the activationslide channel 125. Further, activator channel 79 and activation slidechannel 125 may be configured to fit together geometrically so as to addadditional stability to the cartridge when it is engaged with thecartridge station. Cartridge station 70 may also include edge seamdetails 88. Edge seam details 88 may be configured to geometricallyalign with the corners of cartridge fitment 110. This may provide forfurther stabilization when the cartridge is engaged with the cartridgestation 70.

FIG. 13( c) depicts a view of the bottom side of the cartridge station70. An activator controller cable 21 may be linked with the activatorspring 87 to control the activator knob 86, which may be spring loadedsuch that the default position is an off position. An edge guardcontroller cable 23 may be functionally linked to the edge guard 66(shown in FIG. 21, for example). Accordingly as the user activatescontroller 20, for example, the cable 21 transfers movement to activatorknob 86 which controls the opening and closing of the product flow pathfrom the container to the spreader.

FIG. 14 depicts a cross-sectional view of the cartridge spreader withoutthe cartridge engaged. The cross-sectional view will be described inmore detail with respect to FIG. 15, which illustrates an up closecross-sectional view of the spreader body 40. In particular, FIG. 15depicts a close-up cross-sectional view of the spreader body 40 withoutthe cartridge engaged. At least one wheel 30 turns an axle 32 which inturn rotates the gearbox 34 that the axle 32 is coupled with. Thegearbox rotation causes the launching plate 62 to launch, throw, impelor broadcast granular product in front or to the sides of the spreaderdevice. At the end of the drive shaft 64 emanating from the gearbox is abevel gear 84, which is rotatably coupled with the agitator driver 80.The agitator driver 80 drives the cartridge agitator 118 once thecartridge fitment is engaged with the cartridge station. Thus, thelaunching plate and cartridge activator may continuously rotate inconjunction with each other. Locking lever 72 is also illustrated inFIG. 15.

FIG. 16 depicts a close-up cross-sectional view of the upper handleassembly 14. In some embodiments, the handle assembly may includeinternal components which may work in conjunction with edge guardcontroller 22 and activator controller (not pictured). Thus, when a userpulls forward the edge guard controller, the internal components may beconfigured to cause the edge guard 66 to rotate. Further, when a userpulls the activator controller 20, the internal components may cause theactivator controller 20 at the cartridge station to slide, shift, rotateor otherwise move the shutoff plate 120 in the cartridge fitment 110 (asshown in FIG. 11) to the actuated or operational position. Releasing theactivator controller 20 may allow the activator to slide, shift, rotate,or otherwise move into the closed position in which flow of product isblocked. In some embodiments, there may be a physical linkage betweenthe controllers at the upper frame assembly 14 and the componentscontrolled at the spreader body.

FIG. 16( a) depicts a detailed cross-sectional front view of the upperframe assembly 14. The upper frame assembly 14 may include an activatorcontroller 20. In some embodiments, the activator controller is a leverin the upper frame assembly 14, which may include a gear ratio thatmagnifies the applicator lever movement to obtain a larger movement ofthe shut-off plate movement, so the lever travel for the consumer isless. This motion from the top application lever may be transferredthrough a sheathed cable down to the lower assembly and specifically theshutoff plate 120. It should be appreciated that this type of activatorcontroller is described in an exemplary manner, and other possiblecontrollers and controlling techniques are possible. For example, theactivator controller 20 may control the activator through various manualor electro-mechanical devices or means.

In some embodiments, the edge guard controller 22 may control movementof the edge guard 66 through a sheathed cable which rotates the edgeguard 66 around the launcher assembly. Again, it should be appreciatedthat this type of edge guard controller is described in an exemplarymanner only. For example, the edge guard controller 22 may control theedge guard through various mechanical or electro-mechanical means.

FIG. 16( b) depicts a rear view of the upper frame assembly includingcables connecting from the activation controller 20 and the edge guardcontroller 22. In some embodiments, an edge guard controller 22 may befunctionally linked with the edge guard 66 via a cable 23. In someembodiments, an activator controller 20 may be functionally linked withthe activator 78 via a cable 21. In some embodiments, the activatorcontroller 20 may include gear link 25, which may allow for a mechanicaladvantage, allowing a small squeeze of the activator controller 20 tofully activate and deactivate the activator 78.

FIG. 16( c) depicts a rear view of the upper frame assembly, withactivator controller 20 pulled to the “on” position, including cablesconnecting from the activation controller and the edge guard controller.The depiction in this figure is similar to the depiction in FIG. 16( b)except that this figure shows the activator controller in the “on”position, and illustrates how a squeeze of the activator controller maycause an approximately ninety degree rotation of the gear link 25, whichmay act as a pull on the activator controller cable 21. A cable 23,which may connect the edge guard controller 22 to the edge guard 66, isalso depicted.

FIG. 17 depicts a cross sectional view of the spreader with thecartridge 100 engaged. The cross-sectional view will be described inmore detail with respect to FIGS. 18 and 19. FIG. 18 illustrates an upclose cross-sectional view of the spreader body 40. FIG. 19 illustratesan up close cross-sectional view of the upper frame assembly 14.

FIG. 18 depicts a close-up cross-sectional view of the spreader bodywith the cartridge engaged. The at least one wheel 30 turns an axle 32which in turn rotates the gearbox 34 that the axle 32 is coupled with.The gearbox rotation drives the rotation of the launching plate 62,causing the launching plate 62 to launch, throw, impel or broadcastgranular product in front of the spreader device. At the end of thedrive shaft emanating from the gearbox is a bevel gear 84, which isrotatably coupled with the agitator driver 80. The agitator driver 80drives the cartridge agitator 118 once the cartridge fitment is engagedwith the cartridge station. Thus, the launching plate and cartridgeactivator may continuously rotate in conjunction with each other.

Agitated product may then flow downward to the metering plate of thecartridge fitment 110. When the activator has shifted the shutoff plate120 such that the metering plate metering gate is not covered up by theshutoff plate 120, product may flow down to the granular chute 76 of thecartridge station and onto the launching plate 62 where the granules maythen be launched across the terrain or other surface. A locking switch72 may lock the cartridge into a stable position once the cartridge hasbecome engaged with the cartridge station. In addition, the uprightstand 16 may be configured to balance the spreader device in the restingposition when the cartridge is engaged or when the cartridge is notengaged.

FIG. 18( a) depicts a close-up cross-sectional view of the spreaderlower housing with the cartridge engaged and illustrates the flow ofgranular product out of the cartridge. During use of the spreader, thegranular product in the container may be agitated by the agitator 118.If the cartridge is activated such that the shutoff plate 120 (shutoffplate 120 is illustrated more clearly in FIG. 11) is not blocking theflow of granular product, the granular product exiting the container maythen flow through the metering plate 114, the product conveyor 128, downthrough the granular chute 76 (shown more clearly in FIGS. 13 and 21(a), for example), and onto the launching plate 62 which may rotate andthereby launch the granular product out in front of the spreader device,for example. Launching plate 62 may include outer ramp portion 62(a),inner ramp portion 62(c), and fins 62(b). The inner ramp portion 62(c)may be sloped at an angle of 10-20 degrees from the horizontal dashedline A. The slope of the inner ramp portion may help position thegranules at the intersection of the inner ramp portion and the outerramp portion 62(c) so that they might be optimally launched. Outer rampportion 62(a) may be sloped at an angle of 25-35 degrees from thehorizontal dashed line A. The outer ramp portion may help launch thegranules with an initially upward trajectory. The launching fins 62(c)may function cooperatively with the outer ramp portion 62(a) to helpensure that the granular product gets launched over the wheels and in aneven spread pattern distribution over terrain and hard surfaces.

FIG. 19 depicts a close-up cross sectional view of the handle assemblywith the cartridge engaged. This figure illustrates the cartridge 100attached to the container attachment 24. In some embodiments, the upperhandle assembly 14 may include internal components which may work inconjunction with edge guard controller 22 and activator controller 20.Thus, when a user pulls forward the edge guard controller 22, theinternal components may be configured to cause the edge guard 66 torotate. Further, when a user pulls the activator controller 20, theinternal components may cause the activator controller 78 at thecartridge station to slide the shutoff plate 120 in the cartridgefitment to the on or off position. There may be a physical linkagebetween the controllers at the upper frame assembly 14 and thecomponents controlled at the spreader body.

FIG. 20 depicts the gearbox 34. The gearbox 34 works in conjunction withthe axle, which is turned by rotation of the wheels. The gearboxcomponents may fit inside a gearbox housing 39. The axle may include agear connection to the gearbox 34 at the axle bevel gear 36. The axlemay rotate forward in conjunction with forward motion of the wheels. Therotation of the axle may cause the forward rotation of an axle bevelgear 36 which may engage another bevel gear to rotate the launchingplate spinner axis 64. A washer 37 may fit over spinner axis 64 and mayact as a thrust washer which may prevent excessive wear and abrasioncaused by the rotating action. The spinner axis 64 may transform forwardrotation of an axle 32 (as shown in FIG. 1( a), for example) intocounterclockwise rotation, for example, which may drive the granularlaunching plate 62.

FIG. 21 depicts various views and components of the granular productlauncher 60. The granular product launcher 60 may include a launchingplate 62 driven by a spinner axis 64 in the central axis of thelaunching plate 62. The launcher may include a rear housing boundary toprevent granular product from flowing backward. The launcher assembly 60may also include a rotatable edge guard boundary plate 66, which may berotated to the side of the launcher plate to block airborne granules andthus limit the angle of distribution of the granular productintentionally. The operation of edge guard boundary plate 66 isdescribed in detail in U.S. Pat. No. 6,616,074, which is herebyincorporated by reference in its entirety.

The granular product launcher assembly may also include an upper housing67. The upper housing 67 of the launcher assembly may be the bottom faceof the cartridge station 70. As a result, the spinner axis 64 may beable to connect to the agitator driver 80 through agitator bevel gear84. The spinner axis 64 may be able to cause rotation of the agitatordriver 80. The granular chute 76 of the cartridge station may allow forgranular flow onto the spinning granular launching plate 62.

FIG. 21 also illustrates how the upper housing 67, which is the bottomof the cartridge station 70, and bottom piece 69 join together with ashared rear housing 68 to surround the launching plate 62 and edge guard66 which may prevent product from being launched backwards onto the userof the device. Edge guard controller cable guide 23(a) (also shown inFIG. 21( a)) may help affix and guide the edge guard controller cable(illustrated, for example, in FIG. 21( a)) to the upper housing 67.

FIG. 21( a) depicts a view of the top side of the upper plate of thelauncher assembly 60, which joins the cartridge station 70. This viewillustrates how an edge guard controller cable 23 may link with thespreader to cause the edge guard 66 to shift on and off. This view alsoillustrates the granular chute 76 which may engage with the cartridgestation 70. This view also illustrates the agitator driver 80, and theagitator bevel gear 84, which may cause the rotation of the agitatordriver 80. Edge guard controller cable guide 23(a) may help affix andguide the edge guard controller cable 23 to the upper housing 67 of thegranular product launcher.

FIG. 22 depicts the lower housing 50 of the spreader. The spreader lowerhousing may include clearance holes for an axle 32, a rear panel 56which extends up to the cartridge station, and ventilation holes 54,which ensure that product does not build up along the walls of thespreader body. Clearance hole 52 is not visible in this figure, but isshown with respect to FIG. 3.

FIG. 23 depicts a view of the bottom side of the cartridge station 70and a view of the top side of the upper plate of the launcher assembly60. These views are depicted individually in FIGS. 13( c) and 21(a).This view illustrates how an edge guard controller cable 23 may linkwith the spreader to cause the edge guard 66 shift on and off. This viewalso illustrates the granular chute 76 which may engage with thecartridge station 70. This view also illustrates the agitator driver 80,and the agitator bevel gear 84, which may cause the rotation of theagitator driver 80. This view also illustrates an activator controllercable 21 which may be linked with the activator spring 87 to control theactivator knob 86, which may be spring loaded such that the defaultposition is an off position.

FIG. 24 is a front view of the launcher assembly 60 which specificallydepicts the edge guard 66. Launching plate 62 may be configured torotate and thereby impel or broadcast granular product across a terrainor other surface. Edge guard 66 may be configured to rotate aboutspinner axis 64 and partially cover the area where granular product isbroadcast from the launching plate 62. In this depiction, the edge guard66 is in the “off” position.

FIG. 25 is a view of the granular product launcher which specificallydepicts the edge guard 66 (as shown in FIG. 21, for example) rotated inan “on” position. The spreader device may be maneuvered on wheels 30 andmay balance on upright stand 16 when in the resting position. Launchingplate 62 may be configured to rotate and thereby impel or broadcastgranular product across a terrain or other surface. Edge guard 66 may beconfigured to rotate partially over the launching plate therebypartially covering the area where granular product is broadcast from thelaunching plate 62, as described in U.S. Pat. No. 6,616,074, which isincorporated by reference herein in its entirety. In this depiction, theedge guard 66 is in the “on” position. The edge guard visual indicator71 may allow the user of the spreader see that the edge guard is in the“on” position while maneuvering the device.

Accordingly, the embodiments of the present inventions are not to belimited in scope by the specific embodiments described herein. Further,although some of the embodiments of the present invention have beendescribed herein in the context of a particular implementation in aparticular environment for a particular purpose, those of ordinary skillin the art should recognize that its usefulness is not limited theretoand that the embodiments of the present inventions can be beneficiallyimplemented in any number of environments for any number of purposes.Accordingly, the claims set forth below should be construed in view ofthe full breadth and spirit of the embodiments of the present inventionsas disclosed herein. While the foregoing description includes manydetails and specificities, it is to be understood that these have beenincluded for purposes of explanation only, and are not to be interpretedas limitations of the invention. Many modifications to the embodimentsdescribed above can be made without departing from the spirit and scopeof the invention.

The invention claimed is:
 1. A mobile device for spreading, over terrainor other surface, granular product applications contained in acartridge, the mobile device comprising: a granular product launcher; acartridge station comprising: at least one cartridge engager that isconfigured to engage with a cartridge comprising a cartridge fitmentthrough matching of mechanical design features on the cartridge stationwith mechanical features on the cartridge fitment, wherein the cartridgeis removable from the at least one cartridge engager and the cartridgecomprises a container, functionally joined to the cartridge fitment, forholding the granular product; and the at least one cartridge engagercomprising: a locking mechanism configured to stabilize the cartridgeafter engagement with the cartridge station through engagement withcomplementary locking structures on the cartridge fitment when in afirst position, the locking mechanism being further configured torelease the cartridge in a second position; and a cartridge activator,configured to activate and deactivate the flow of granular product outof a cartridge; and an activation controller configured to control thecartridge activator and thereby control the activation and deactivationof an engaged cartridge.
 2. The mobile device according to claim 1,wherein further the locking mechanism is configured to be actuated aplurality of times between the first and second positions.
 3. The mobiledevice according to claim 1 further comprising at least one wheel formoving the mobile device over the terrain or other surface.
 4. Themobile device according to claim 1, wherein the cartridge activatorcomprises a slide engaging abutment configured to shift about a slideactivation channel that is configured to mate with a complementarystructure located on the cartridge fitment.
 5. The mobile deviceaccording to claim 1, wherein the mobile device, when coupled with thecartridge, is configured to allow granular product to flow at apredetermined, constant rate.
 6. The mobile device according to claim 1further comprising a frame with handlebars and an upright stand, theupright stand configured to allow the mobile device to stand uprightwhen not in motion.
 7. The mobile device according to claim 6 whereinthe handlebars comprise the activation controller.
 8. The deviceaccording to claim 1 wherein the granular product comprises ice meltinggranules, fertilizer, pesticides, granular soil amendment material,granular oil absorbent material, dusting products, granular floorcleaning product, grass seed, or combinations thereof.
 9. The mobiledevice according to claim 1, further comprising: a particle conveyorconfigured to facilitate the flow of granules from the cartridge to thegranular product launcher.
 10. The mobile device according to claim 1,wherein the granular product launcher is configured to distribute agranular product in a pattern over the terrain or other surface.
 11. Themobile device according to claim 10, further comprising: a rotatablearcuate plate that is configured, when in a first position, to alter thepattern of the distribution of granular product from the granularproduct launcher.
 12. The mobile device according to claim 11, furthercomprising: a second position wherein the pattern is not altered. 13.The mobile device according to claim 11, further comprising: a visualindicator that the rotatable arcuate plate is in the first position, thevisual indicator being mounted to a radially extending arm portionconnected to the rotatable arcuate plate.
 14. The mobile deviceaccording to claim 1, wherein the cartridge is prefilled with thegranular product prior to engagement with the cartridge station.
 15. Themobile device according to claim 1, the cartridge station furthercomprising: an agitator drive shaft that mechanically couples to anagitator driver on the cartridge fitment.
 16. The mobile deviceaccording to claim 15, wherein the agitator drive shaft, through themechanical coupling to the agitator driver, causes an agitator to rotatewithin the cartridge when the mobile device is in motion.
 17. The mobiledevice according to claim 4, wherein the cartridge activator activates aflow meeting gate on the cartridge fitment to open or close an openingon the cartridge fitment, that, when the flow metering gate is openallows the granular material to flow out of the cartridge and the flowmetering gate is configured to allow flow at a predetermined, constantrate of the granular material from the cartridge.
 18. A mobile devicefor spreading, over terrain or other surface, granular productapplications contained in a cartridge, the mobile device comprising: agranular product launcher; a cartridge station comprising: at least onecartridge engager comprising a locking mechanism that is configured tostabilize the cartridge after engagement with the cartridge stationthrough engagement with complementary locking structures on a cartridgefitment when in a first position, the locking mechanism being furtherconfigured to release the cartridge in a second position and whereinfurther the locking mechanism is configured to be actuated a pluralityof times between the first and second positions, wherein the cartridgeis removable from the at least one cartridge engager and the cartridgecomprises a container, functionally joined to the cartridge fitment, forholding the granular product; a cartridge activator, configured toactivate and deactivate the flow of granular product out of a cartridge,comprising a slide engaging abutment configured to shift about a slideactivation channel that is configured to mate with a complementarystructure located on the cartridge fitment; and an activation controllerconfigured to control the cartridge activator and thereby control theactivation and deactivation of an engaged cartridge.